[rules-users] getting details of facts triggering rules

[Wolfgang Laun]

This may be more conveniently done from an event listener but
drools.getActivation() should give you the Activation. Then you get
the Collection<FactHandle>.

For each of them,
org.drools.runtime.KnowledgeRuntime.getObject(
org.drools.runtime.rule.FactHandle )
gives you the fact objects that participates.

You can also access bindings:
  List<String> declIds = activation.getDeclarationIDs();
  Object declVal = activation.getDeclarationValue( declId );
Be careful, things may have passed away, i.e., you can get nulls.

-W

2011/2/16 Archie Russell <archier at gmail.com>:
>
> Hi,
> I've tried to figure this out but haven't been able to.
> How can I, from the RHS, figure out the details of what triggered a rule.
> I can access the facts individually by name,  but how do I do it in a
> generic fashion that would work in the RHS of any rule?
> I am using decisiontables and want to be able to have a function that is
> something like printTriggeringDetails()
> I came across drools.getTuple but am not sure if that's the correct path
> to go on.   From there I get InternalFactHandles but don't know how to turn
> those into human-readable facts.
> Thanks for any help,
> Archie
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>